Removal of mercury (II) by dithiocarbamate surface functionalized magnetite particles: Application to synthetic and natural spiked waters

The role of operational parameters on the uptake of mercury by dithiocarbamate functionalized particles

“…According to the Langmuir model, the sorption will occur until reach a saturation value, beyond which no further sorption can take place. The saturation of the sorbent is represented by a plateau in the equilibrium isotherm and theoretically corresponds to one complete monomolecular layer of coverage [17].The fitting of the Langmuir model shows a good agreement with the experimental data for the lowest C Hg,e concentrations (Fig. 9a), followed by high deviations between the experimental equilibrium data and the predicted ones.…”

“…This principle has been exploited to produce functionalized silica's whose surfaces have chemical moieties with high affinity for mercury [14,15]. Our interest in this kind of sorbents led us to develop dithiocarbamate functionalized core/shell magnetite/silica particles with high sorption capacity for Hg(II) [16,17]. Very recently, we have reported a new strategy for the surface modification of magnetite particles that resulted into magnetic sorbents with silica shells enriched in dithiocarbamate groups [18].…”

Magnetic adsorbents for the treatment of water/wastewater—A review

“…This was due to the change in zeta potential of nanoparticle-mercury complex from negative to positive at higher Hg(II) concentrations. Batch experiments were carried out by with dithiocarbamate functionalized Fe 3 O 4 particles to study the effect of sorbent for Hg(II) removal from water [154]. 6 mg/L of magnetic particles was sufficient enough to produce a residual Hg(II) concentration lower than 1 g/l for initial metal concentration equal to 50 g/l.…”

One-pot synthesis of multi-functional magnetite–polysilsesquioxane hybrid nanoparticles for the selective Fe3+ and some heavy metal ions adsorption

“…20 In general, the sulphur group present in the functional materials showed so base nature, which prefers to adsorb or bond with so acid metal ions. 19,21,22 The mercapto functional group also showed the adsorption and complexation behaviour of various other metal ions based on the material nature.…”